Concrete-mixing machine.



J. DANIEL.

coucam MIXING MACHINE.

1,253,945. I APPLICATION FILED MAY 3|| 191L Patented Jan. 15

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APPLICATION men mus!) I917.-

Patented Jan; 15,1918.

2 SHEETS-SHEET 2- aftogmu rily 3OHN DANIEL, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO KOEHRING MACHINE COMPANY,

OF MILWAUKEE, WISCONSIN.

concnnTE-mxme MACHINE.

Specification of Letters Patent.

Patented Jan. i5, 191%.

Application filed May 31, 1917. Serial No. 171,993.

To all whom it may concern:

Be it known that I, JOHN DANIEL, a citizen of the United States, residing at Milwaukee, in the county of Milwaukeeand State of Wisconsin, have invented certain new and useful Improvements in Concrete- Mixing Machines, of which a specification.

This invention embodies certain improvements in concrete mixing and distributing machines. The invention has to do primawith the concrete mixer and certain associated loading and discharging means for said mixer, all of which are commonly employed today in many types of mixers at the present upon the market. In these mixing machines it is usual to employ a rotary mixing drum adapted to be loaded or charged at one end by means of a loading skip which receives the aggregates at the ground level and is thereafter elevated to supply the desired charge of aggregates to the mixer. The mixing drum is customarily discharged from the end opposite that into which the aggregates are fed by the loading skip and suitable discharge controlling means are utilized for the discharge purpose.

The improvements hereinafter described involve the utilization of certain instrumentalities cooperatively associated with the loading skip and with the discharge controlling means whereby to insure an adjustment of the latter to a position prevent-s ing discharge action of the drum, preliminary to the feeding of the aggregates into the drum by the loading skip.

In the more specific embodiment of the invention the discharge means employed by me is a common type, namely a discharge chute located at the outlet end of the mixing drum and adapted to be positioned so as to permit and to prevent discharge of the aggregates which are customarily elevated in the drum and dropped upon the discharging chute when the latter is in its discharging position. Should the discharging chute be in its discharging position when the aggregates are fed into the drum of; the

loading skip it is evident that there is a possibility of premature dischargingl of the aggregates. It is to avoid the likeli 00d of premature discharge that I employ suitable opera-ting devices mounted on the frame of the machine and adapted to be actuated by the loading skip as it is raised to its drum the following is charging position, these operating devices being geared to the discharging chute so as to forcibly move the latter into a non-discharging position prior to the feeding of the aggregates into the mixer.

The invention involves, supplemental to the foregoing main features, certain details of construction which will appear more fully upon reference to the following description in connection with the accompanying drawings, in which:

Figure 1 is a side elevation of a Well known type tributing machine and illustrating the discharge controlling instrumentalities internllediate the discharge chute and the loading s 1p.

Fig. 2 is an enlarged view as compared with Fig. 1, showing more particularly the actuatin means between the loading skip and disc arge chute, certain main portions of the machine being shown in dotted lines.

Fig. 3 is an end view of the machine looking toward the discharge chute and bringin out more fully the relative arrangement an' constructions of the manual and automatic operating devices.

For the purposes ofthis description it will suflice to state that the mixing and distributing machine to which the present invention is applied is known as the Koehring paver and embodies the customary supporting truck adapted to be driven under its own power by the provision of a suitable motor thereon, said truck including a frame A at one end of which is located the loading skip B. The skip B is adapted to be raised by any suitable mechanism which has no hearing upon this invention, and when raised aggregates placed in the skip at the ground level will be discharged into the mixing drum D carried by the frame A. From the drum D the mixed materials are adapted to be discharged by the discharge chute C which is pivoted on the frame in such a manner that when its outer end is raised the chute is inactive so far as discharging is concerned, but when the position of the chute is reversed so that it inclines downwardly at its outer end materials constantly being eleyated in the drum D are adapted to drop of concrete mixing and disthe skip B and the chute O comprise an operating bar 1 mounted for horizontal sliding movement on the frame A by the provision of suitable bearings therefor. Carried by the skip B is an abutment 2 adapted to impinge the bar 1 and to force it lon tudinally toward the discharging end of t e drum D, this action taking place just previous to the discharging of the aggregates from the skip B into the drum incident to the elevation of the skip. A cable 3 is connected at its opposite end to the bar 1 at spaced points in the length of the latter and one end portion of said cable passes in one direction around a pulley 4.- and the other end passes in an opposite direction around a pulley 5, these pulleys being coaxial and supported by the frame A. At its middle portion the cable 3 is looped about a rooved element 6 fixed on or inteal with a bevel gear 7 which is likewise xed to the shaft 9 which forms the pivotal support for the chute C and by whlch the chute is adapted to be tilted into discharging or nondischarging positoins. There is employed a manual operating .device for the chute O in.the form of a bevel pinion 8 carried by a shaft 10 supported in suitable bearings on the frame work and diagonally arranged respecting the shaft 9. The pinion 8 meshes with the bevel gear 7 and a crank handle 11 is carried by the shaft 10 whereby the latter may be turned manually to move the chute C to its discharging position. The chute" C of course is returned to its non-discharging position by operation of the manual device aforesaid but shouldvthis be overlooked by the operator in the use of the machine it will be evident that owing to the operating provisions that have just been described, as the skip B is elevated the bar 1 will be operated to actuate the cable 3 in such a manner that the chute C will be caused to assume anondischarglng position before a new batch of materials is introduced into the mixer by the skip B. The pulleys 4 and 5 are independent of one another so that they may rotate positively when the cable 3 is actuated and the cable is frictionally engaged with the grooved member 6 to insure the proper operation of the devices as described.

Having thus described my invention, what I claun as new 1s:

with a mixer, a charging device therefor and means whereby to effect discharging of i ing between said bar and the discharging means aforesaid whereby to effect a nondischarging adjustment of the latter when the operating bar is actuated.

2. In-a mixing machine, the combination 1. In a mixing machine, the combination 1 with a mixer, a charging device therefor and means whereby to effect discharging of the contents of the mixer, said discharging means comprising a discharge chute movable into discharging and non-discharging positions, of an operating bar shiftable by the charging device as the latter moves to charge the mixer, and cable driving instrumentalities intermediate said bar and the chute.

3. In a mixing machine, the combination with a mixer, a charging device therefor and means whereby to efiect discharging of the contents of the mixer, said discharging means comprisinga discharge chute movable into dischargingand non-discharging positions, of an operating bar shiftable by the charging device as the latter moves to char e the mixer, cable driving instrumentalities intermediate said bar and the chute including a cable having its ends fixed to the operating bar at spaced points in the length of the latter, a grooved member frictionally engaged by a looped ortion of said cable, and a connection etween said grooved member and the chute whereby the latter may be moved as an incident to actuation of the grooved member by the cable.

4. In a mixing machine, the combination with a mixer, a charging device therefor and means whereby to effect discharging of the contents of the mixer, said discharging means comprisinga discharge chute movable into discharging and non-discharging positions, 'of an operating bar shiftable by the charging device as the latter'moves to charge the mixer, cable driving instrumentalities intermediate said bar and the chute, and a manual device also adapted to operate said chute. I

5. In a mixing machine, the combination with a'mixer, a charging device therefor and means whereby to effect discharging of the contents of the mixer, said discharging means comprising a discharge chute movable into discharging and non-discharging positions, of an operatin bar shiftable by the charging device as t e latter moves to charge the mixer, cable driving instrumentalities intermediate said bar and the chute, and manual means for actuating the chute including a shaft and a train of gearing intermediate' said shaft and said member.

6. The combination with a mixing machine embodying a mixer, a loading skip adapted to be elevated to charge the mixer, and a discharge chute movable into discharging and non-discharging positions, of an operating bar supported adjacent to the skip, means on the skip for shiftin said bar longitudinally as the skip is raise a shaft connected with the chute to act ate the same, a gear fixed to said shaft an having a grooved element connected therewith, a

grooved cable attached to said bar at spaced points, separate pulleys about which said cable passes in opposite directions, the cable being looped intermediate its ends about the grooved element aforesaid whereby as the bar is moved said grooved element, its gear and the connected shaft will be actuated.

7. The combination with a mixing machine embodying a mixer, a loading skip adapted to be elevated to charge the mixer, and a discharge chute movable into discharging and non-discharging positions, of an operating bar supported adjacent to the skip, means on the skip for shifting said bar longitudinally as the skip is raised, a shaft connected with the chute to actuate the same, a gear fixed to said shaft and having a grooved element connected therewith, a cable attached to said bar at spaced points, separate pulleys about which said cable passes in opposite directions, the cable being looped intermediate its ends about the grooved element aforesaid whereby as the bar is moved said grooved element, its gear and the connected shaft will be actuated,

and manual means for operating said chute including a pinion meshing with the gear and an operating shaft for said pinion.

In testimony whereof I aflix my signature.

JOHN DANIEL. 

